1. Hashimoto Polymer Phasing Project, ERATO, Japan Science and Technology Corporation, Keihanna Plaza, Seika, Kyoto 619-02, Japan, Central Laboratory, Rengo Co., Ltd., 186-1-4, Ohhiraki, Fukushima, Osaka 553, Japan, and Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Sakyo, Kyoto 606-01, Japan